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Flight Reliability

DL 5247 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 5247 moved between routes during this period. Numbers below combine all of them, so treat them as background, not a verdict. For a cleaner answer, check the route you are actually flying.

Combined across all its routes

73%
Arrive within 15 minutes
15 min
Average arrival delay
1.7%
Cancelled
5 min early
Median arrival delay

Based on 580 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon67%(86 flights)
  • Tue73%(89 flights)
  • Wed82%(85 flights)
  • Thu71%(78 flights)
  • Fri64%(81 flights)
  • Sat81%(64 flights)
  • Sun73%(85 flights)
On-time by departure window
  • 3–6 PM74%(261 flights)
  • 6–9 PM72%(307 flights)
On-time trend by month
59%
May

Jun 57% → May 59% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202557%47
July 202550%46
August 202573%55
September 202580%59
October 202592%60
November 202573%55
December 202573%56
January 202685%39
February 202681%21
March 202663%48
April 202684%50
May 202659%32
Departures on time
70%
Diverted
0.3%
Flights flown
568
Months covered
12

Keep nerding

Based on 580 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.